linux-kernel - Re: [PATCH 1/2] dt-bindings: dma: ti: Add J721S2 BCDMA

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Date:   Thu, 4 May 2023 19:04:11 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Vaishnav Achath <vaishnav.a@...com>, peter.ujfalusi@...il.com,
        vkoul@...nel.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org
Cc:     dmaengine@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, j-choudhary@...com, u-kumar1@...com,
        vigneshr@...com
Subject: Re: [PATCH 1/2] dt-bindings: dma: ti: Add J721S2 BCDMA

On 03/05/2023 08:53, Vaishnav Achath wrote:
> Add bindings for J721S2 BCDMA instance dedicated for Camera
> Serial Interface. Unlike AM62A CSI BCDMA, this instance has RX
> and TX channels but lacks block copy channels.
> 
> Signed-off-by: Vaishnav Achath <vaishnav.a@...com>
> ---
>  .../devicetree/bindings/dma/ti/k3-bcdma.yaml  | 21 +++++++++++++++++++
>  1 file changed, 21 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/dma/ti/k3-bcdma.yaml b/Documentation/devicetree/bindings/dma/ti/k3-bcdma.yaml
> index beecfe7a1732..5ca9581a66f4 100644
> --- a/Documentation/devicetree/bindings/dma/ti/k3-bcdma.yaml
> +++ b/Documentation/devicetree/bindings/dma/ti/k3-bcdma.yaml
> @@ -33,6 +33,7 @@ properties:
>      enum:
>        - ti,am62a-dmss-bcdma-csirx
>        - ti,am64-dmss-bcdma
> +      - ti,j721s2-dmss-bcdma-csi
>  
>    reg:
>      minItems: 3
> @@ -150,7 +151,27 @@ allOf:
>  
>        required:
>          - power-domains
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            const: ti,j721s2-dmss-bcdma-csi
> +    then:
> +      properties:
> +        ti,sci-rm-range-bchan: false
> +
> +        reg:
> +          maxItems: 4
>  
> +        reg-names:
> +          items:
> +            - const: gcfg
> +            - const: rchanrt
> +            - const: tchanrt
> +            - const: ringrt
> +
> +      required:
> +        - ti,sci-rm-range-tchan
>      else:
>        properties:


You now require 5 reg items on ti,am62a-dmss-bcdma-csirx. I don't think
you tested your DTS against this change. Rework the else: so it will
match specific variant (if:).

Best regards,
Krzysztof